iseed | Frontend project template , with full test | Continuous Deployment library
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Based on advice on the lecture about infrastructure at Yandex.
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QUESTION
I am trying to output 25 random values between 3 and 7 using a function. Every time I run my program, I receive two values that are within those parameters, but the rest are out of range.
...ANSWER
Answered 2021-Dec-06 at 21:57You are calling rand()
only 1 time, and storing the result in randomNumb
, which is a single integer.
Your array is being created with only 1 element in it - the value of randomNumb
. But, you are telling showArray()
that the array has 25 elements, which it doesn't. So, showArray()
is going out of bounds of the array and displaying random garbage from surrounding memory. Which is undefined behavior.
If you want 25 random numbers, then you need to allocate an array that can hold 25 numbers, and then call rand()
25 times to fill that array, eg:
QUESTION
I am testing out Google Cloud Run as a platform to run a new project. Project is developed using NodeJS and Laravel. Created a docker images based on php-fpm. This image runs fine on my dev environment running Ubuntu 21.04 and Docker 20.10.8.
When running the same image deployed on Google Cloud Run the application hangs randomly.
I have narrowed it down to a specific line in imported symfony http send function, class called from laravel index.php. Application will hang a function call to fast_cgi_finish_request()
. It will hang on that line 70% of cases and call to timeout after 300 seconds when nginx times out.
Hanging line in ./vendor/symfony/http-foundation/Response.php
:
ANSWER
Answered 2021-Sep-14 at 12:56I encountered the same problem recently (specifically, using Laravel Passport).
We were also making use of mounted secrets, and noticed that every 10-30 minutes our application would hang and time out after 60s (our configured timeout in Cloud Run). One of my colleagues noticed that every time our application started hanging, one of the first things to start failing was the reading of the mounted secret.
I asked about this behaviour in the Google Cloud Community Slack workspace, and one of the Cloud Run PM's replied indicating that they were rolling back a recent implementation change.
I suspect that you encountered the same issue that we did (running our application in GKE also worked fine).
If it's at all possible, switch to mounting your secrets into your environment. This should resolve the issues of your application hanging.
QUESTION
I am working on a large program that I have parallelized with OMP, and in several places for the parallelization I have to make a choice between using pointers or copies of arrays of data. I had an intuitive sense that the choice might have an impact on compute time, but I am uncertain. In the example program given below, I am unable to discern a difference.
compile with:
gfortran paralleltest.f90 -fopenmp
run with:
...ANSWER
Answered 2020-Sep-16 at 21:01The code is not conforming for two reasons:
the function result
value
inaggregate_data
is not defined before being referenced.in the main program, the pointer component
x
of the elements ofpointers
have undefined pointer association status when passed to theaggregate_data
procedure, on account of the first actual argument in the calls toassociate_pointer
not having the TARGET attribute.
(You can call a procedure with a dummy argument that has the TARGET attribute with a corresponding actual argument that does not, but when you do, pointers associated with the dummy argument (such as ptr
inside associate_pointer
) become undefined when execution of the procedure completes.)
The errors in the program can be corrected by giving the parent
variable in the main program the TARGET attribute, and by sticking an appropriate assignment statement prior to the loop in aggregate_data
.
Beyond correctness, the only difference between the two loops is in the actual argument passed to aggregate_data
- one loop passes an array designated by an allocatable component, one loop passes a array designated by a pointer component. The procedure takes that array argument as an assumed shape array dummy argument without CONTIGUOUS - given typical implementation of assumed shape arrays there's no need for the compiler to do anything different passing pointer vs allocatable.
(If the dummy argument of aggregate_data was explicitly or implicitly contiguous, there may be a need for the compiler to copy the pointer array prior to the call as pointers can be associated with non-contiguous arrays. Allocatable arrays are always contiguous.)
Both loops write their result to an non-target allocatable array of different kind to the actual argument components - so there cannot be any aliasing across the assignment statement.
Neither actual argument is being modified within the loops, so potential aliasing issues associated with the pointer arguments designating the same array in different iterations are moot (besides which, from the compiler's perspective - that's a guarantee that is on the head of the programmer - it doesn't have to care).
All up, I'd expect the same machine instructions to be issued for the two loops. Similar timing is unsurprising.
Results may differ if different work is done in the loops - if aliasing or contiguity comes into play.
Where the approaches will differ is in the data copying required to set the allocatable array components arguments up. But that is (intentionally?) outside that timing regime.
As of Fortran 2003 on (which this code requires), do not use POINTER's unless you need reference semantics.
QUESTION
I am kinda new to C but I keep getting this segmentation fault before main and I have no Idea why, I would ask my professor but she is busy with other things ATM to worry about something as trivial as this.
Here full code:
Any Help would be appreciated.
EDIT: I beleive it is seg faulting before main because I have put a print statement on the first line of main and it faulted before that line.
I am compiling with gcc program.c -o prog -lpthread -DUNIX
and running it on Ubuntu subsystem for windows, but I have never had this problem with it before.
ANSWER
Answered 2020-May-05 at 17:32This is gdb's backtrace, it doesn't say the segmentation fault occurs before main(), but after main(), slightly after queueInit() has been called:
QUESTION
I try to move my laravel 5.8 to 7x branch. I try to move 6 branch firstly. But I got errors with maddhatter/laravel-fullcalendar, as I got error with
...ANSWER
Answered 2020-Apr-15 at 07:40the maddhatter/laravel-fullcalendar
dependency need the version 5
of illuminate/support
.
So you can't update laravel
with this dependency. Moreover, it seems that this project was not updated since 3 years
But a fork exist here.And it works with laravel
for 5,6 and 7 https://github.com/nelkasovic/laravel-full-calendar/blob/master/composer.json#L15
QUESTION
I've tried a bunch of garbage to try and get the variables right but I keep screwing it up and I can't figure out where to place the variables correctly. I'm also having a really hard time placing my if and else if statements.
...ANSWER
Answered 2020-Mar-13 at 22:59int sum1 = A + B;
in the do
/while
loop declares a new sum1
that hides int sum1 = 0;
as a result, nothing ever changes the outer sum1
from 0.
change
QUESTION
I have laravel 6 backend rest api app and I want to create Swagger docs for add I found https://github.com/DarkaOnLine/L5-Swagger plugin which I suppose could use usefull creating Swagger docs But I encountered erros publishing config. I suppose I really need this step.
...ANSWER
Answered 2020-Feb-15 at 13:05As far as I see from your stack trace, the command fails to create a views directory (./resources/views/vendor/l5-swagger
).
Note: chown -R www-data:root .
- this command can create some new problems..
After that command, owner is www-data (but you start artisan commands as serge
).
After that command, group is root
(but serge
may not be part of that group).
You have to verify that your user (serge
) has proper permissions there (./resources/views
, ./resources/views/vendor
).
To check current permissions run: ls -la ./resources
, ls -la ./resources/views
, and ls -la ./resources/views/vendor
(if vendor exists already)
Maybe you need something like: sudo chmod -R serge.www-data
(serge - owner, www-data - group)
However, it mostly depends on your specific setup and desired result.
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